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long jump

Shannon O'Donnell, Christopher M Beaven, Matthew Driller
PURPOSE: To assess the effect of match-day napping and duration of naps on perceptual and performance indices in elite female netball players over two consecutive netball seasons. METHODS: Fourteen elite female netball athletes (mean ± SD; age = 23 ± 6 yr) participated in an observational study over 26 competition matches. On each match day, athletes provided information on their napping habits, perceived energy levels, and then performed 3 countermovement jumps (CMJ) 3h30 prior to the start of the match...
March 15, 2018: International Journal of Sports Physiology and Performance
Andrew J Kossow, Tyler G DeChiara, Steve M Neahous, William P Ebben
Plyometric exercises are frequently performed as part of a strength and conditioning program. Most studies assessed the kinetics of plyometric exercises primarily performed in the vertical plane. The purpose of this study was to evaluate the multi-planar kinetic characteristics of a variety of plyometric exercises, which have a significant horizontal component. This study also sought to assess sex differences in the intensity progression of these exercises. Ten men and ten women served as subjects. The subjects performed a variety of plyometric exercises including the double leg hop, standing long jump, single leg standing long jump, bounding, skipping, power skipping, cone hops, and 45...
March 12, 2018: Journal of Strength and Conditioning Research
Bethany L Hansberger, Shellie Acocello, Lindsay V Slater, Joseph M Hart, Jatin P Ambegaonkar
CONTEXT:   Anterior cruciate ligament (ACL) injuries often occur during jump landings and can have detrimental short-term and long-term functional effects on quality of life. Despite frequently performing jump landings, dancers have lower incidence rates of ACL injury than other jump-landing athletes. Planned versus unplanned activities and footwear may explain differing ACL-injury rates among dancers and nondancers. Still, few researchers have compared landing biomechanics between dancers and nondancers...
March 12, 2018: Journal of Athletic Training
Kim Hébert-Losier, Lina Schelin, Eva Tengman, Andrew Strong, Charlotte K Häger
BACKGROUND: Anterior cruciate ligament (ACL) ruptures may lead to knee dysfunctions later in life. Single-leg tasks are often evaluated, but bilateral movements may also be compromised. Our aim was to use curve analyses to examine double-leg drop-jump kinematics in ACL-reconstructed, ACL-deficient, and healthy-knee cohorts. METHODS: Subjects with unilateral ACL ruptures treated more than two decades ago (17-28years) conservatively with physiotherapy (ACLPT , n=26) or in combination with reconstructive surgery (ACLR , n=28) and healthy-knee controls (n=25) performed 40-cm drop-jumps...
March 7, 2018: Knee
António M Antunes, Duarte L Freitas, José Maia, Donald Hedeker, Élvio R Gouveia, Martine Thomis, Johan Lefevre, Lisa M Barnett
The first aim of this study was to investigate the relationship between motor performance and body fatness among 3- to 5-year-old children. The second aim was to assess whether this relationship works similarly for boys and girls. We also investigated whether socioeconomic status (SES) and geographical area when children are aged 3 years old predicts the motor performance of 4 and 5-yr-old children. Motor performance was assessed through the Preschool Test Battery, while body fatness was estimated through body mass index (BMI)...
March 9, 2018: Journal of Sports Sciences
Christos D Karkos, Georgios Koudounas, Ioakeim T Giagtzidis, Maria-Aphroditi Mitka, Ioannis Pliatsios, Konstantinos O Papazoglou
Popliteal artery injury is a potentially-limb threatening complication of traumatic knee dislocation. We describe two such cases that had been treated in our unit over the last decade. The first one was a 23-year-old woman who injured her right knee during a long jump competition and the second was a 27-year-old man who had a motorbike accident. Both suffered traumatic knee dislocation along with significant ligament and neurovascular injuries. In the first patient, the popliteal artery was found thrombosed due to intimal rupture and required thrombectomy and vein patch repair, whereas, in the second patient, the artery was completely transected and required end-to-end anastomosis...
March 5, 2018: Annals of Vascular Surgery
M Bohnsack
OBJECTIVE: Complete arthroscopic decompression of the impinging subspinal soft tissues and resection of the hypertrophic bone formation between the anterior hip capsule and the anterior inferior iliac spine (AIIS) or decompression of a hypertrophic AIIS. INDICATIONS: Painful anterior hip impingement and decreased hip flexion following a hypertrophic osseous subspinal deformation. CONTRAINDICATIONS: No clinical symptoms or decreased anterior hip function despite radiological osseous subspinal hip impingement...
March 2, 2018: Operative Orthopädie und Traumatologie
Sara King-Dowling, Christine Rodriguez, Cheryl Missiuna, Brian W Timmons, John Cairney
PURPOSE: School-age children with Developmental Coordination Disorder (DCD) have poor health-related fitness (HRF), but little is known about when these deficits emerge. The purpose of this study was to determine if 4- and 5-year old children who meet the criteria for DCD exhibit poorer HRF than typically developing (TD) children, and if this relationship is mediated by vigorous physical activity (VPA) engagement. METHODS: Five-hundred and ninety-two children participated (age 5...
February 23, 2018: Medicine and Science in Sports and Exercise
Brooklyn J Fraser, Leigh Blizzard, Michael D Schmidt, Markus Juonala, Terence Dwyer, Alison J Venn, Costan G Magnussen
OBJECTIVES: To assess whether childhood cardiorespiratory fitness (CRF) and muscular fitness phenotypes (strength, power, endurance) predict adult glucose homeostasis measures. DESIGN: Prospective longitudinal study. METHODS: Study examining participants who had physical fitness measured in childhood (aged 7-15 years) and who attended follow-up clinics approximately 20 years later and provided a fasting blood sample which was tested for glucose and insulin...
February 14, 2018: Journal of Science and Medicine in Sport
Rodrigo Ramirez-Campillo, Cristian Álvarez, Antonio García-Hermoso, Robinson Ramírez-Vélez, Paulo Gentil, Abbas Asadi, Helmi Chaabene, Jason Moran, Cesar Meylan, Antonio García-de-Alcaraz, Javier Sanchez-Sanchez, Fabio Y Nakamura, Urs Granacher, William Kraemer, Mikel Izquierdo
Recently, there has been a proliferation of published articles on the effect of plyometric jump training, including several review articles and meta-analyses. However, these types of research articles are generally of narrow scope. Furthermore, methodological limitations among studies (e.g., a lack of active/passive control groups) prevent the generalization of results, and these factors need to be addressed by researchers. On that basis, the aims of this scoping review were to (1) characterize the main elements of plyometric jump training studies (e...
February 22, 2018: Sports Medicine
Raphael Fabricio de Souza, Dihogo Gama de Matos, Alexandre Reis Pires Ferreira, Philip Chilibeck, Natalie de Almeida Barros, Alan Santos de Oliveira, Luana Mendonça Cercato, Danielle Soares da Silva, Felipe José Aidar
The aim of this study was to investigate the effect of prophylactic use of nonsteroidal anti-inflammatory drugs (NSAID, i.e. Ibuprofen) on physical performance, vertical jump, muscle biomarkers, liver, kidney, acute pain and hydration status of participants in the 42 km Trail Running Challenge, a long-distance race integrated over mountain routes. The sample consisted of 20 males randomly divided into two groups: a control group (CG) and an experimental group (EG) with 12 completing the race (41.1±8.8 y; 75...
February 14, 2018: Journal of Strength and Conditioning Research
Daniel López-Plaza, Fernando Alacid, Jacobo Ángel Rubio, Pedro Ángel López-Miñarro, José María Muyor, Pedro Manonelles
Traditionally, physical and anthropometrical profiles of the most successful kayak athletes have been identified in male kayakers. This study attempted to identify the differences in morphology and fitness level of two performance-based groups of young elite female paddlers. Eighty-six female kayakers, aged 13.62 ± 0.57 years (mean ± SD) were allocated in two groups (Top-10 and Rest) depending on their ranking in the three Olympic distances (200, 500 and 1000 meters). All subjects underwent a battery of anthropometrical (heights, weight, girths and sum of skinfolds), physical fitness (overhead medicine ball throw, countermovement jump, sit-and-reach test and 20-m multistage shuttle run test) and specific performance assessments (200, 500 and 1000 meters)...
February 14, 2018: Journal of Strength and Conditioning Research
Patrick Delisle-Houde, Nathan A Chiarlitti, Ryan E R Reid, Ross E Andersen
Hockey player's body composition and physical fitness are suggested to influence coaching decisions regarding on-ice playing time. The purpose of this study was to explore the relationship between seasonal body composition changes, off-ice pre-season testing and on-ice metrics. Twenty-one Canadian collegiate hockey players (22.70 ± 1.30 years old, 181.0 ± 5.92 cm, 86.52 ± 6.41 kg) underwent off-ice physical testing at the beginning of their season, and had one total body dual energy x-ray absorptiometry scan at the beginning and end of the season...
February 14, 2018: Journal of Strength and Conditioning Research
Michael J Duncan, Thomas Hames, Emma L J Eyre
This study examined whether scheduling of object control (e.g., throwing, catching) and locomotor skills (e.g., running, jumping), within an integrated neuromuscular training (INT) program, results in different responses in motor competence, muscular fitness and perceived motor competence in 6-7 year old children. Seventy seven boys and 63 girls (n = 140) from 3 primary schools were randomised into three, 10-week interventions, Loco First (n = 50) where locomotor skills were performed first followed by object control skills; Object First (n =48) where object control skills were performed first followed by locomotor skills or a control group (n =42, CON) who undertook school Physical Education...
February 14, 2018: Journal of Strength and Conditioning Research
Tobias A Mattei
The author describes a case of a non-osteoporotic adult presenting with multilevel compression fractures at the apex of the thoracic kyphosis after strenuous rope jumping. MRI demonstrated diffuse bone marrow changes in the vertebral bodies with only a very small unilateral endplate fracture. Besides highlighting the oftentimes neglected role of repetitive sub-pathological axial load forces in traumatic spinal injuries, the observed imaging pattern substantiates previous experimental studies which demonstrated that under cyclic axial loading the initial damage occurs in the cancellous regions of the bone (with observation of microscopic/50-100 μM long cracks), ultimately leading to a reduction in its elastic modulus...
February 14, 2018: World Neurosurgery
Rosario Martínez-Herrero, David Maluenda, Ignasi Juvells, Artur Carnicer
We introduce a new method for producing optical needles with tunable length and almost constant irradiance based on the evaluation of the on-axis power content of the light distribution at the focal area. According to theoretical considerations, we propose an adaptive modulating continuous function that presents a large derivative and a zero value jump at the entrance pupil of the focusing system. This distribution is displayed on liquid crystal devices using holographic techniques. In this way, a polarized input beam is shaped and subsequently focused using a high numerical aperture (NA) objective lens...
February 8, 2018: Scientific Reports
Satoshi Yamashita, Yasuhiro Nakazawa, Shusuke Yamanaka, Mitsutaka Okumura, Tatsuhiro Kojima, Nobuto Yoshinari, Takumi Konno
In natural ionic solids, cationic and anionic species are alternately arranged to minimize electrostatic energy. Aggregation of identical ionic species is commonly prohibited due to the repulsive, long-range nature of Coulombic interactions. Recently, we synthesized unique ionic solids, [AuI4CoIII2(dppe)2(D-pen)4]X2·nH2O (dppe = 1,2-bis(diphenylphosphino)ethane, D-pen = D-penicillaminate), in which complex cations are self-assembled into a cationic supramolecular octahedron, while monovalent or divalent inorganic anions are aggregated into an anomalous anionic cluster accommodating several water molecules...
February 8, 2018: Scientific Reports
Olivier Navaud, Adelin Barbacci, Andrew Taylor, John P Clarkson, Sylvain Raffaele
The range of hosts that a parasite can infect in nature is a trait determined by its own evolutionary history and that of its potential hosts. However, knowledge on host range diversity and evolution at the family level is often lacking. Here, we investigate host range variation and diversification trends within the Sclerotiniaceae, a family of Ascomycete fungi. Using a phylogenetic framework, we associate diversification rates, the frequency of host jump events, and host range variation during the evolution of this family...
February 8, 2018: Molecular Ecology
Tommi Ojanen, Keijo Häkkinen, Tommi Vasankari, Heikki Kyröläinen
Introduction: Few studies have reported the amount of physical activity (PA) and its associations to physical performance of warfighters during military field training (MFT). The purpose of this study was to investigate changes in neuromuscular performance and PA among male Finnish Army conscripts during a 21-d MFT and to evaluate their recovery during 4 d after MFT. Methods: Body composition and physical performance were measured four times during the study (before MFT (PRE), after 12 d (MID), post training (POST) and after 4 d of recovery (RECO))...
February 6, 2018: Military Medicine
Dionysia Aravopoulou, Konstantinos Kyriakos, Anna Miasnikova, André Laschewsky, Christine M Papadakis, Apostolos Kyritsis
The thermoresponsive behavior of two diblock copolymers PS-b-PNIPAM and PS-b-PMDEGA, which both comprise a hydrophobic polystyrene block but different thermoresponsive blocks, also differing in length, poly(N-isopropylacrylamide) (PNIPAM) and poly(methoxy diethylene glycol acrylate) (PMDEGA), respectively, was comparatively investigated in a wide temperature range. Concentrated aqueous solutions containing 25 wt% polymer, were studied by small-angle X-ray scattering (SAXS), differential scanning calorimetry (DSC) and broadband dielectric spectroscopy (BDS)...
February 8, 2018: Journal of Physical Chemistry. B
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